Automatic speed-controlling device



Oct. 5 1926.

D. E. LEWELLEN AUTOMATIC SPEED CONTROLLING DEVICE 2 Sheets-Sheet l f t Filed Nov. 25, 1922 F/ELE?.

Oct. 5 1926.

DI E. LEWELLEN AUTOMATIC SPEED CONTROLLING .DEVICE Filed Nov. 25, 1922 2 Sheets-Sheet 2 Patented Oct. 5, 1926.

UNITED STA-TES PATENT OFFICE.

"DARCY El LEWELLEN, OF COLUMBUS, INDIANA, ASSIGNOR TO LEWEILEN MANUFAC- TUBING PCOMPANY, OF COLUMBUS, INDIANA, A CORPORATION OF INDIANA.

AU'IOIAIII'J SPEED-CONTROLLING DEVICE.

Application illed November 23, 1922. Serial No. 602,908.

This invention relates to speed controlling devices particularly ada table for controlling that form of varia le speed transmission mechanism in which there are two parallel shafts, each carrying two slidable disks, and in' which the s eed is changed by moving all the disks slmultaneously, the speed of one shaft being increased by movin the disks of that particular shaft outward y or awa from fthe center of the transmission mec anism, or decreased by moving the disks inwardly or towards the center of the transmission mechanism, the improved structures herein set forth being preferably emyployed in conjunction with the mechanisms set forth in co-pending application Serial No. 580,312. The prime feature of the invention in conjunction with the features set forth and embodied in the co-pending application is the provision of means for intermittently setting up operation of the speed controlling mechanism for the transmission mechanism.

A further feature of the invention is the provision of means for creating impulses or relatively small movements at intervals for causing intermittent operations of 'the speed changing means.

A further feature of the invention is the provision of means for regulating the duration of the impulses. i

A, further feature of the'invention' is the provision of means for regulating the elapslng time between the impulses and for varying the time elapsing between the impulses.

A further feature of the invention is the provision of a selecting mechanism for determining the direction of travel of the speed changing mechanism prior to imparting an impulse. n

A further feature of the invention is in so constructing and arranging the selecting mechanism that parts thereof will operate the impulse creatin mechanism.

O ther objects an advantages will be hereinafter more fully set forth and pointed out in the accompanying specification.

-In the accompanying drawings,-

Figure 1 is an elevation of a variable speed transmission mechanismshowing the same em loyed for-operating a fabric treating mec anism with the speed controlling deviceattached thereto,

Figure 4 is an edge elevation of the selecty ing mechanism, y

Figure 5, is a detail elevation of a contact forming bar, and

Figure 6 is a similar view of a modified form of bar.

Referring to the drawings, in which similar reference' numerals designate corresponding parts throughout the several views, 1 indicates a variable speed transmission mechanism of that type employing pairs of disks 2, around which is extended a driving belt 3, levers (not shown) being provided for` moving said pairs of disks for changing the speed of travel of the driving shaft to which the variable speed transmis- `sion mechanism is attached.

In manufacturin fabrics in strips, said strips are subjecte successively to various treatments and a plurality of batteries of the variablespeed mechanisms are used, and as the strip being treated travels at a speed greater or less at one point than at another point in the length of the strip, it is necessary to provide means for controlling the speed of the various transmission mechanisms as the various changes occur in the length ofthe strip being treated.

In operating a cloth or fabric machine, I

that form of transmission mechanism dis` closedin Figure 1 is preferably used and in rangedthat the strip of fabric 6 will be immersed or carried through a solution within a vat 7, and as there are a number of vats and each succeeding treatment different from the preceding one, the fabric is caused to lengthen or shorten depending upon the treatment to whichV it is being subjected, conseuently the fabric passing through one vat wil vary in length in a kdifferent manner from the portion of fabric passing through otherl vats. As there isa speed transmission mechanism associated with and driving the pulleys of each vat, the levers of the various transmission mechanisms must be at intervals shifted in accordance with the changing conditions of the fabric during the suc` cessive treatments thereof in order to maintain the speed of the various transmission mechanisms in co-operative relation with each other. A

The 'shifting of the levers employed for moving the disks is most successfully accomplished by providing a worm shaft 8 in co-operation with said levers, to one end of which shaft is attached a gear 9, and meshing with said gear 9 is a pinion l0 attached to the rotor of an electrically driven motor 11, consequently when the motor is driven in opplpsite directions the levers will be shifted ack and forth for controlling the transmission disks 2 and the belt 3 co-operating therewith for increasing or decreasing the speed of the driven shaft of the variable speed mechanism.

The transmission mechanism 1 is operated from a three phase motor 12, wires 13, 14 and 15 connecting the motor with any suitable source of electric ower.

In order to automaticlly control the speed of each successive mechanism, an idling roll 16 is slidably mounted between standards 17, which standards have elongated slots 18 through which the shaft 19 of the idling roll extends and b extending the strip of fabric below the id ing Vroll any shortening or lengthening of the fabric will instantly raise or lower the idling roll. The movement of the idler roll 16 is employed for changing the speed of the transmission mechanism by mounting one end of a pitman 19 on one end-of the shaft 19 and connecting the o posite end thereof to a lever 20, the opposlte end of said lever being pivotally mounted on a stub shaft 21 located within andsupported by a housing 22. Also rotatably mounted on stub shaft 21 is a block 23 preferably of insulating material, and to said block are pivotally connected the inner ends of contact forming bars 24 and 25,

' said bars being respectively above and below the stub shaft 21 and extendingl a distance beyond the edge of the block 23 and preferably at an angle to the longitudinal axis of the lever 20. The contact bars 24 and 25 at a point beyond the edge of the block 23 are connected together by means of a spring 26 which normally holds the contact bars in engagement with the shoulders 27 formed between the block 23 and a guide 28, consequently limiting. the inward swinging movement of the contact bars while they will have free outward swinging movement.

The outer ends o f the contact bars 24 and are provided with contact screws 29 and 30 respectively, which are adjustable through the contact bars and are adapted to engage with contact plates 31 and 32 respectively, carried by the lever 20. By this construction when the lever 20 is raised or lowered through the upward or downward movement of the idling roll 16, the contact screws 29 or 30 will be engaged and a circuit to the motor 11 closed, and as said motor is connected to the wires 13, 14 and 15 the formin of the contact through the movement o the lever 2O will energize the motor 11 and through the pinion 1() and gear 9 rotate the worm shaft 8 and shift the levers for changing the position of the disks 2.

The contact bars 24 and 25 are connected together by a wire 33, the opposite terminus of the wire 33 engagin a gap 34 which is normally closed throug a plate 35 carried by a switch lever 36, a sprlng 37 normally holding the plate 35 in engagement with an adjustable screw 38 carried by gap 34.

The swinging movement of the block 23 is limited by adjusting screws 43 and 44 which are threaded through the terminals of a bracket 45 mounted interiorly of the housing 22. Said screws, however, do not affect the swinging movement of the lever 20 or the bars 24 and 25, as the spring 26 will yield to ermit additional swinging movement of either of the members 24 or 25 after the block is in engagement with one or the other of the adjusting screws 43 or 44.

Plates 31 and 32 are connected with the magnets 46 and 47 respectively, of an automatic switch 48 (Figs. 1 and 2) through wires 49 and 50 respectively, and the automatic switch is connected with the three phase motor 11 through the wires 51' and 52 and the magnets are in turn connected to the power wires 13, 14 and 15, as is also the motor 11 through the wires 53, 54 and 55. The automatic switch 48 is provided with a swinging bar 56 to which are attached the contact tongues 57 and' 58, said contact tongues being adapted for engagement with the contacts 59 or 60, dependent upon which of the plates 31 or 32 is in engagement with either the contact screws 29 or 30 for completing a circuit through the wires connected therewith. The contacts 59 are so arranged that the motor 11 will be driven in one direction when the contact tongues 57 and 58 are engaged therewith, and in the opposite direction when said' contact tongues are in engagement with the contacts 60, and these connections are controlled through the magnets 46 and 47.

Under ordinary running conditions the lever 20 plays back and forth between tne contact screws i29v and 30, and in the event the roll 16 continues to move in the same direction, after contact has been made with one of the contact screws, the block 23 and the bars 24 and 25 will swing with the lever 20, .thus providing an instantaneous break throu h the circuit when the movement of the idler 16 is reversed In the event of an excess movement of the roll 16 and lever 20 such as tomove the block 23 sufficiently to bring the extension 39 into engagement with either of the adjusting screws 43 or 44, the lever 20 may continue its lswinging movement even though the movement of the block is stopped as the spring 26 will yield and permit either of the bars 24 or 25 to swing-away -from their respective shoulders 27. This provides for a prolonged contact between the contact screws 29 or 30 andthe plates 31 or 32 as the contact will continue until the lever 20 reverses its movement sufficiently to allow the lever, carrying the contacting screw to again engage with its respective shoulder 27 when the circuit will be broken. This continued or prolonged con-v tact gives an excess adjustment to the disks 2 which is very essential in theevent the' idler roll 16 has reached a point adjacent its limit of movement in either direction, or when two or more speed mechanisms encounter a change of speed simultaneously, the object being to maintain the idling roll as near its center of travel as possible. This action is not brought into use, however, except when a contact is made at a time when the idler 16 is near its limit of movement. g f

In the event the strip of fabric should become severed theidling roll will descend to the bottom of the slot in the standard 17 thus causing the lever 20 to strike vthe free end of the switch lever 36 and break the circuit between the plate and the wire 33 thereby 'automatically stopping the operation of the shifting mechanism of that particular speed mechanism.

With the elementsso far described it is a I t diiiicult matter to instantly change the speed of the processing machines, due partially to the momentum of the parts of the machines, they being ofsuch construction and size as to set up considerable momentum, and for other kindred reasons, consequently the roll 16 has a tendency to move continuously through approximately its entire range of travel under certain conditions.

4It has also been found that under average conditions a more accuratespeed regulation is secured by making the speed changes in a number of comparatively smally movements and allowing an interval of time between these changes,- so that the processing machines may adjust themselves to the changed speed conditions and by making the duration ofthe speed changing action, as well as the interval between changes adjustable, it is possible "to secure very accurate speed control and maintain the idler -roll 16 in approximately the center of its travel. To this end, therefore, a controlling mechanism 84 is provided comprising a sliding block 85, which is slidably mounted upon rods 86 mounted in a housing 87 ,said housing being preferably mounted immediately above the housing 22 encasing the circuit making and the lever 88 for contact with said pins may be varied, said pins b eing connected with contact plates 92 and 93 respectively, and these plates are connected respectively with the Wires 49 and 50 through the medium of wires 94 and 95 respectively. Mounted 'in any suitable manner on the upper edge of the sliding block is a contact bar 96 which is providedon its upper edge with a plurality of extensions 97 with which co-operates a contact tongue 98 carried-by a swinging latch 99, said latch being pivotally mounted to a part of the housing 87. The latch 99 preferably operates by gravity althoughany suitable means may be`provided for retaining the tongue 98 in position to engage `the extensions 97, and in order to regulate and control the duration of each impulse created by the tongue 98 engaging one of the extensions 97 a screw 100 is arranged for engagement with an extension 101 at one end of the latch 99 and by adjusting the Said screw longitudinally, the end ofA the latch 99I containing the contact tongue 98, may be moved towards or from the contact bar 96. It will also be understood that the distance between the extensions 97 may be increased for increasing the duration of time between each successive impulse, as best shown in Figure 6 of the drawings, and as more pronounced impulses are essential as the roll 16 advances towards its extremities, the extensions 97 are referably varied in height as best shown in *igures 5 and 6 of the drawings, the extensions at the central portion of the contact bar 96 being of less height than those at the .extremities thereof, consequently the duration of contact between the shorter extensions and tongue 98 will be less than when the bar 96 has been shifted to position the contact tongue 98 near theextremities of the bar.

The contact bar 96. is connected with a engagement, a circuit will be closed through the wires 49 and 94, plate 89, wire 103, plate 102, contact bar 96, contact tongue 98, wire 104 and wire 83, while should the contact plate 89 move into engagement with the pin 91 VRand the contacts 29 and 31 are not engaged, the circuit will pass through the wire 50, wire 95, plate 89, wire 103, contact bar 96, contact tongue 98, wire 104 and wire 83, thereby reversing the rotation of the motor 11 from the direction of rotation caused by the closing of the circuit throughthe plate 89 and contact pin 90.

It is not necessary that the contacts at 29 and 31 and also at 90 and 89 both be closed to make the device operative. The unction of the contacts 29 and 31 isto give a continued movement to the speed changing device whereas when the circuit is closed only through Contacts 89 and 90' the speeds are changed by a succession of impulses caused by tongue 98l dragging over the contact points on 97. Normally my control loperates A entirely with the lever moving up and `in cabinet #22 are inoperative.

down without contacts 31 and 32. striking. It is only when there is unusual speed conditions that these contacts do strike.

The switch 48, Figure 1, is operated in two distinct manners-first, by a series of circuit closing movements traced as follows-from wire 83-through parts 104, 98, 97, 102, 103, 89, 90, 94 to wire 49 or second, from wire 83 through parts 104, 98, 97, 102, 103, 89, 91 and 95 to wire 50. The other method of operating this switch is from a circuit traced as followsfrom wire 83 through parts 35, 38, 34, 33, 24, 29, 31 to wire 49. In other words either method operates entirely independently of the other. The safety device 36 operates in case the fabric or other material breaks and the lever 20 drops to its lowest position. This breaks the circuit between parts 35 and 38 so that the parts contained At the same time the block 85 is moved to the right to such an extent that the teeth on bar 96 are out of contact with tongue 98 so that the parts contained in cabinet 87 are also inoperative.

Assumin that lever 20 has been elevated so that it c oses the circuit at 29 and 31 and also at l89 and 90 by way of the link 107 and that it continues on its upward travel swinging block 23 against stop screw 44 and expanding spring 26 and assuming that then the lever 20-starts in a downward direction, spring 26 now begins to contract, the contact between 29 and 31 continuing until bar 24 rests against shoulder 27, when any further movement of lever 20 breaks the circuit at 29 and 31. This provision is made to take care of conditions of the work where it is necessary to give a prolonged contact for prolonged speed changing movement at certain times.

Assuming that when lever 20 is in its extreme upper position mentioned above and that it begins its downward movement, spring26 immediately contracts and at the same time the circuit is broken between 89 and 90 and contact made between 89 and 91. This would seem to give a speed changing impulse in the opposite direction but this is not the case because the swinging bar 56 of switch 48 remains in the position determined by contacts 29 and 31 or 89 and 90 until bar 24 strikes shoulder 27 and the circuit is opened between 29 and 31. The reason for this is that when the switch 56 is held against either magnet 46 or 47, Fia. 2, it remains in this position even though Ithe opposite coil is energized because the switch is interlocking. That is, it cannot be moved by one coil as long as the other coil is in the circuit. The instant the circuit is broken between 29 and 31, the contacts 89 and 91l B5 would throw the switch in the opposite direction providing the circuit was closed in that instant between the notched bar 96 and the tongue 98.

The operation of the contact forming lever 88 and the movement of the slidin block 85 is controlled from the lever 20, a ll crank lever 105 being pivotally mounted in. the housing 87 between the sliding block 85 and the lever 20, the vertical arm of the bell crank lever being connected with the vertical portion of the contact forming lever 88 by a. link 106, while the horizontal arm of the bell crank lever is connected to the lever 20 by means of a pitman 107. The contact forming lever 88 not only acts to form contact between plate 89 and the pins 90 and 91, but also causes the block to move lengthwise of the rods 86, but movement of the block will not result until the contact plate 89 has been shifted and a contact formed for determining the direction of travel of the motor 11, this dependin upon which of the pins 90 or 91 is engage by the contact late 89. The bell crank lever 105 is rocked or'operating the sliding block and parts connected therewith by the movement of the lever 20 and it will be readily seen that as the lever 2O starts to move in either direction, incident to the shifting of the idler roll 16, a contact will be formed between one of the extensions 97 and the contact tongue 98 thereby giving a degree of impulse to the motor 11 and the number of impulses with each upward or downward swinging movement of the lever 20 will depend upon the de ree of movement of the idling roll 16 an the duration and frequency of the impulses will depend upon the position of the contact bar 96 with respect to the contact tongue 98 and the distance between the extensions 97 and difference in height thereof.

With the addition of the controlling mechanism 84 it Will be readily seen that the change of -speed in the transmission mechfor operating the speed changing parts, and c that the required travel of the idling roll 16 will be greatly lessened and more nearly maintained at` the center of its movement.

It will further be seen that when the idling roll 16 is in the central zone of its travel only slight speed changes are required to maintain the proper speed conditions, hence the formation of the extensions 97 at the central portion of the bar 96 of less height than those at the extremities thereof, consequently the duration of contact between the contact tongue 98 and the shorter extensions 97 will be relatively slight as will also the movement im art'ed to the speed changing parts.

t should be noted as a distinctive featureof .the invention that speed-changing iinpulses are imparted to the variable speed transmission mechanism whenever' the condition of the strip or sheetof material or strand-like body, in the machine changes its tension or otherwise varies its condition and that this occurs altogether irrespective of the position of the roller 16 in its slot.

While the invention is herein shown and described as usedvin connection with a variable speed transmission mechanism, it is to be ,understood that ,the controlling mechanism ma be successfully used in controlling a variab e s ed motor from which the machine is driven direct thereby dispensing with the variable speed transmission mechanism.

Having thus fully described'm vention, what I claim as new ain secure by Letters Patent, is Y 1. The combination of a driven machine, a variable speed transmission mechanism including driving and driven elements in frictional engagement with each other said elements being relativel adjustable to provide an infinite number o speed changes between determined limits, a speed changing mechsaid indesire to anism operative on the variable speed trans- .mission mechanism, a speed controlling device, and means associated with the speed controlling device for imparting one or more relatively small movements to an adjustable element of the speed changin mechanism.

'2. The combination of a riven machine, a variable speed transmission mechanism including driving .and driven elements in frictional 'engagement with each other said elements being relatively adjustable to provide an infinite number of speed changes between determined limits, a speed ychanging mechanism operativeon the variable speed transmission mechanism, a speed controlling device, means associated with the speed controlling device for imparting one or .more relatively small movements to an adjustable element of the speed changing mechanism,

and means for determining the direction of movement of said speed changing mechamsm.

3. The combination "of a driven machine, a variable speed transmission mechanism including driving and driven elements in frictional engagement with each other said elements being relatively adjustable to provide an infinite number of speed changes between Ydetermined limits, a speed changing mechanism operative on the variable speed transmission mechanism, a speed controlling device, means associated with the speed controlling device for imparting one or more relatively small movements to an adjustable element r`of the speed changing mechanism, and means for determining the direction of movement of said speed changing mechanism prior to'imparting movement thereto. 4. The combination of a driven machine, a variable speed transmission mechanism having a plurality of shafts, said mechanism including driving and driven elements in frictional contact with each other which elements are relatively adjustable to provide an infinite number of Speed changes between determined limits, a speed changing mechanism operative on said variable speed transmission mechanism, and electrically operated means for controlling the speed of one of said shafts by imparting one or more rela-- tively small movements to an adjustable element of the speed changing mechanism.

5. The combination of a driven machine having a movable part, a variable speed transmission mechanism including driving and driven elements'l in frictional engagement with each other said elements being relatively adjustable to provide an infinite number of speed changes between determined limits, a speed changin controlling means there or operated by said movable part, and .means for imparting one or more relatively small movements to an adjustable element of said speed changing mechanism incident to the continued travel of the movable part in one direction.

A 6. The combination with a variable speed mechanism, speed shaft by imparting one or more relatively small movements to said disks.

7 The combination with a variable speed transmission mechanism having one relatively constant speed shaft, and one relatively variable speed shaft, disks slidably mounted on each shaft, the relative speed of the variable speed shaft being determined by the position of the disks on the shafts, a mechanism for moving the disks on the shafts, and a machine driven thereby, of automatic means for controlling the speed of said variable speed shaft by imparting one or more relatively small movements to said disks.

8. The combination with a variable speed transmission mechanism having one relatively constant speed shaft, and one relatively variable speed shaft, disks mounted on each shaft, the relative speed of the variable speed shaft being determined by the position of the disks on the shafts, and a machine driven thereby, said machine having a movable part, of means operated by said movable part for increasing or decreasing the speed of said machine by imparting one or more relatively small movements to the disks incident to the travel of the movable art. p 9. The combination with a variable speed transmission mechanism having one relatively constant speed shaft and one relatively variable speed shaft, disks mounted on each shaft, the relative speed of the variable speed shaft being determined by the position of the disks on theshafts, and a machine driven thereby, said machine havin a movable part, of means operated by said movable parts for increasing or decreasing the speed of said machine by imparting one or more small movements to the disks incident to the travel of the movable part, and means for determining the direction of movement of said disks prior to imparting movement thereto.

10. The combination with a variable speed transmission mechanism and a machine driven thereby, said machine having a movable part, of a speed changing mechanism, means operated by said movable part for controlling the speed of said machine by imparting one or more relatively small movements to the speed changing mechanism when the movable part is relatively nearer the center of its travel, and a continuous movement to the speed changing mechanism when the movable part is relatively nearer the ends of its travel.

11. The combination with avariable speed transmission mechanism and a machine driven thereby, said machine having a movable part, of a speed changing mechanism, means operated by said mov able part for controlling the speed of said machine by imparting one or more relatively small movements to the speed chan ing mechanism when the movable part 1s relatively nearer the center of its travel, and continuous movement to the speed changing mechanism when the movable part is .relatively nearer the ends of its travel, and means for determining the direction of movement of said speed changing mechanism prior to im- A parting movement thereto.

transmission mechanism and a machine driven thereby, said machine having a movable part, of a speed changing mechanism, and means actuated by said movable part for controlling the speed of said machine by imparting a number of relatively small separate movements to said speed changing mechanism the duration of said movements being determined by the position of said movable part.

14. The combination with a variable s ed transmission mechanism and a mac ine driven thereby, said machine having a movable part, of a speed changing mechanism, and means actuated by said movable part for controlling the speed of said machine by imparting a number of relatively small separate movementsk to said speed changing mechanism, the frequency of said movements being' less for certain portions of the movemeans than for other por-V ment im artin tions, and the (gnat-ion of said movement beinfr determined by the position of said movable part.

15. In 'an automatic speed controlling device, the combination with a fabric treating mechanism having a movable element, a variable speed transmission mechanism and an electrically controlled means for changing the speed of the transmission mechanism, of means operated by said movable elementfor energizing said electrical controlling means, and means for intermittently imparting an impulse to said electrical controllin means.

16. n an automatic speed controlling device for a fabric treating element having a movable part, a variable speed transmission mechanism, a motor operated means for changing the speed of the transmission mechanism, means controlled from said movable part of said fabric treating element for energizing said motor adjacent the end of the stroke of said part of said element, and means for intermittently imparting impulses to said motor at points intermediate the ends of the stroke of the movable part of said element.

17. The combination with a. fabric treating element having a movable part influenced by said fabric, a variable speed transmission mechanism for driving said fabric treating element, and electrically operated shifting mechanism for shifting parts of said transmission mechanism for regulating the speed of the treating element,of means influenced bythe movementJ of said movable portion of said treating element for intermittently energizing said shifting mechanism, and means for regulating the duration of the operation of said shifting mechanism. y l

18. The combination with a variable s eed transmission mechanism, and a mac ine driven thereby, said machine having a movable part, of a speed changing mechanism, speed controlling means thereforoperated by said movable part, means for imparting successive relatively small impulses to said speed changing mechanism incident to the continued travel of the movable part in one direction, and means for determining the direction of movement of said speed changing mechanism -prior tc imparting movement thereto. j

19. The combination ,with a driving element and a machine driven thereby, said machine havin a movable part, of a speed changing meianism, speed controlling means therefor operated by said movable part, and means for imparting a series of relatively small movements to said speed changing mechanism incident to the continued travel of the movable part in one direction'. g

20. The combination with a drivingelementand a machine` driven thereby, said machine havingla movable part, of a s eed changing mec anism, speed contro ing means therefor operated, by said movable part, means for imparting' successive relatively small movements to said speed changing mechanismincident to the continued `travel of the movable part in one direction and means for determining the direction o movement of said speed changing mechanism prior to imparting movement thereto.

21. The combination withy afabric treating element having a movable part influenced by said fabric, a variable speed transmission mechanism fordriving said fabric treating element, and electrically operated means for shifting parts of said transmission mechanism for regulating the speed of the treating element, of means influenced by the movement of said movable portion of said treatin element for intermittently energizing sai shiftin mechanism, and means for regulating the 'uration and frequency` of the operation of Said' shifting mecha- 22.' The combination with a variable s eed transmission mechanism and a mac ine driven thereby, said machine having a movable part, of a speed changing mechanism',

I .means actuated by said movable part for controlling the speed of said kmachine by imparting a knumber of separate movements parting a number of separate movements to said speed changing mechanism, and means for imparting movements to said speed changing mechanism at irregular intervals with said movable part traveling at a uniform speed, the duration of each movement being determined by the position of said movable part.

24. The combination with a driven machine of variable speed transmission mechanism, a motor, speed adjusting mechanism driven thereby, a control device movable to cause operation of the motor, arid means for causing a movement of the control device to operate the motor in a succession of impulses whereby the parts of the driven machine may coordinate their operation between such impulses, substantially as set forth.

25. The combination with a driven machine of a variable speed transmission mechanism, .adjusting means therefor, power operating means for saidspeed adjusting means, an automatic control device for said power operating means, and connections between the control device and the power operating means whereby movement of the control device within certain limits imparts relativelv brief normal impulses to. the speed adjusting means and movement outside said limits imparts impulses of greater duration thereto, substantially as set forth.

26. The combination with a driven machine of a variable Speed transmission mechanism, speed adjusting means therefor, power operating means for said speed ad'- justing means, an automatic control device for said power operatingV means, and connections between the control device and the power operating means whereby movement Within certain limits imparts nor-y mal impulses to the speed adjusting means and movement outside said limits imparts 'impulses .of greater duration thereto ,While a movement in one direction beyond afurther limit stops the operation of the speed changing mechanism substantially as set forth. i

27, The combination with a driven machine, of means for transmitting power thereto at variable speeds, a plurality of electric circuits adapted to act on said means to raise or lower the speed of driven' parts of said machine, a movable member controlled` by the material in the machine for closing said circuits selectively, and means to break up the action of the circuit thus closed into a series of impulses acting on the speed-varying means, including a multiple-toothed contact member having a movement of translati0ri,and a pivoted contact member cooperating therewith, substantially.

a series of impulses acting on the speedvarying means including a multiple-toothed contact member having a movement of translation, a pivoted contact member cooperating therewith, and adjustable means for limiting the pivotal movement of said member, substantially as set forth.

29. The combination with a driven machine, of means for transmittin power thereto at variable speeds, a plurality of electric circuits adapted t0 act on said means to raise or lower the speed of driven parts of said machine, a movable member controlled by the material in the machine for closing said circuits selectively, and means to break up the action of the circuits thus closed into a series of impulses acting on the .speed-varying means including a multiple-toothed contact member having a movement of translation, and a pivoted contact member cooperating therewith said latter contact having'wiping engagement With the teeth of the first, substantially as set forth.

30. The combination with a driven machine, of means for transmitting power thereto at variable speeds, a plurality of electric circuits a'dapted to act on said means to raise or lower the speed of driven parts of said machine, a movable member controlled by the material in thev machine for closing said circuits selectively, and means to break up the action of the circuits thus closed into a series of impulses acting on the speed-'varying means including a multipletoothed contact member having a movement of translation, and a pivoted contact member cooperating therewith the teeth of the first-named contact member varying progressively in size toward the ends of said member, substantially as set forth.

31. The combination with a driven machine of variable speed transmission mechanism, speed adjusting means therefor, power -operating means for adjusting said means, controlling means for the power operating means, and connections whereby the movements of the controlling means cause the power operating means to act on said speed adjusting means in a series of relatively brief impulses, substantially as set forth.

32. The combination with a driven machine of' variable speed transmission mechanism, speed adjusting means therefor, power operating means for adjusting said means, an element under control of the material operated on by the machine, controlling means for the power operating means actuated by said element, and connections between said means whereby the controlling means causes the power operating means to act on said s eed adjusting means in a series of relatively brief impulses during movement of lsaid element in one direction, substantially as set forth.

33. The combination of a driven machine, a variable speed transmission mechanism for driving the same having a pluralit of shafts said mechanism including driving and driven elements in frictional contact with each other which elements are relatively adjustable to provide an infinite number of speed changes between determined limits, an adjusting means for said variable transmission mechanism, and electrically operated means for controlling the speed of one of said shafts by imparting one or more relatively small movements to said elementsthrough said adjusting means, substantially as set forth.

34. The combination of a driven machine for handling a strip of material, a movable element contacting with said strip, means for feeding said strip, and means controlled by said movable part'- for varying the action of the feeding mechanism upon any change in the line of movement of said strip irrespective of the position of said movable part relative to the remainder of the machine, substantially as set forth.

85. The combination with a machine of variable speed transmission mechanism for driving the same, adjusting means for said variab e speed changing mechanism, a plurality of electric circuits adapted to act on said means to raise or lower the speed of driven parts of said machine, a movable member controlled by the material in the machine for closing said circuits selectively, and means to break up the action of the circuit thus closed into' a ser-ies of impulses actin on the speed-adjusting means, substantia ly as set forth.

In witness whereof, I have hereunto set my hand and seal at Indiana olis, Indiana, this 20th'day of November, D. nineteen hundred and twenty-two.

`DARCY E. LEWELLEN. [1.. 8.] 

